How to Use Your Proxy Services with Firefox but without the FoxyProxy Browser Extension
Open the Firefox Options window . Use Preferences (⌘,) if you are using Mac.
Click the “Advanced” tab.
Click the “Network” tab. Then click the “Settings” button.
Select “Manual Configuration”. Enter the Host/IP address and Port number that was displayed at checkout and in your welcome email.
Check “Use this proxy server for all protocols” and click “OK”. (3)
That’s it! When prompted by Firefox to enter a username/password, enter the username and password provided to you at checkout and in your welcome email.
To confirm it’s working, visit https://getfoxyproxy.org/geoip and ensure it says a different location and IP address than you expect.
To disconnect, go through steps 1-44 again and select “No Proxy” in the option dialog.
